Every ice maker has one small existential question to answer, over and over: is the bin full? Get the answer wrong in one direction and you're rationing cubes from a bin that's never more than a sad layer deep; wrong in the other and the maker buries itself in its own product. The component answering that question is either a humble wire arm or an invisible infrared beam — and both fail in ways worth two minutes of checking before anyone orders a part.
The wire arm: honest, mechanical, easily bullied
Classic makers use a feeler arm that rides the ice pile — pile high, arm up, production pauses. Its failure modes are charmingly physical: a bag of peas parks the arm in the raised "full" position and production quietly stops; a freezer rearrangement leaves it wedged down and the maker never rests. Check the arm swings freely through its whole travel, isn't bent from a past collision, and hasn't been clicked into its shutoff detent by accident — that detent is also the legitimate off switch, worth knowing on purpose.
The invisible beam: smarter, moodier
Most modern French-door units replaced the arm with an infrared eye across the bin mouth. It's tidy until something interrupts the conversation: a frost film over the emitter or receiver windows (our damp air is good at this), a cube welded in the beam path, a bin seated a centimeter off its rails, or condensation fogging the lens after a door-open party. Symptoms split the same way: beam falsely "blocked" — production stops with a half-empty bin; beam falsely "clear" — overflow. The two-minute check: bin out, windows wiped dry, beam path cleared, bin reseated firmly. Many models blink a diagnostic pattern at the eye when you press the door switch — your manual decodes it.
When it's genuinely the part
An arm mechanism that's floppy at the module, or an eye that fails its blink test with clean windows and a seated bin, has earned replacement — arms and springs are cheap; sensor boards are modest and usually swap with the assembly. And one impostor to rule out: a freezer running warm makes slow ice that looks like early shutoff; the ten-dollar thermometer check comes first, always.
The visit
We test arm travel, blink codes and mold cycles in minutes, carry the assemblies for common platforms, and quote one written price before touching anything — from Kingston ferry line to Gig Harbor. (509) 841-2179, and the bin goes back to answering its one question correctly.
